Porosity which is present in sediment at the time of deposition or formed during sedimentation. Compare secondary porosity
The movement of newly generated hydrocarbons out of their source rock, or the expulsion of newly generated hydrocarbons from their source rock (see also gas migration)
Generator fuels obtained directly from natural sources e.g., coal, fuel oil, gas oil and natural gas
Primary energy has 5 different usages: transportation, electricity, heating, cooling, steam
Resources that produce energy. Primary energy resources are petroleum, natural gas, coal, hydroelectric power, nuclear electric power, wood and waste, geothermal energy, solar thermal and photovoltaic energy, and wind energy.
Electricity is a secondary energy resource because generating plants use primary energy resources to generate electricity
